Series.ParentDataLabelOption (PowerPoint)

Specifies the parent data label option (banner, overlapping, or none) for the specified series within the chart group. Possible return values are xlParentDataLabelOptionsBanner - The parent label layout is a banner above the category, xlParentDataLabelOptionsNone - No parent labels are shown, xlParentDataLabelOptionsOverlapping - The parent label is laid out within the category.

ActiveWindow.RangeFromPoint.Chart.FullSeriesCollection(1).ParentDataLabelOption = xlParentDataLabelOptionsBanner